S.,
You have had some good suggestions of places you can look. So I'll just play devils advocate a little bit here.
Someone that is experienced enough, has a safe car, proper seats etc. is more than capable of taking the kids on personal errands and kids never mind this. My daycare kids love our errand days because they also know that if they are good in the stores I will take them to the park or if the weather is too hot or cold we'll go to a McDonald's to play in the tunnels. We stop off and check the libraries for special shows like puppet shows or go to the Library on story days. I also keep my car full of books to look at and the ones old enough to read will read stories to the younger ones.
I think you should realize that there is not much money to be made in daycare. Whether it's "babysitting", or an actual childcare provider with other children, our lives must go on as well. We simply don't get paid enough to pay someone else to do our personal work for us.
As far as times being safer, it was only an illusion. With cable tv, the internet and dedicated channels only for news, we hear everything bad right away. People were kidnapped, raped and killed in all centuries. What you need is someone that has a good track record, a cell phone, a safe car and enough experience to get the job done. Or...
If you are able to pay enough per hour, say 10-12 per hour to get someone in that will work exclusively for you, then you can lay down the law and tell them what to do, plan the activities at your home and then by all means you are in charge. But the hours you need might be too few to get someone really experienced because they might need more of a real job to get by on.
Maybe you could place ads on the Kansas City Star website. It's free to place it online only.
Suzi